CN100439989C

CN100439989C - Color flat panel display sub-pixel arrangements and layouts for sub-pixel rendering

Info

Publication number: CN100439989C
Application number: CNB028268636A
Authority: CN
Inventors: 卡戴维·海伦·布朗埃利奥特; 托马斯·莱奥蒂·克雷德尔; 迈克·弗朗西斯·希金斯
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Display Co Ltd
Priority date: 2002-01-07
Filing date: 2002-12-13
Publication date: 2008-12-03
Anticipated expiration: 2022-12-13
Also published as: CN1639765A; EP2270579A2; KR100906632B1; EP2270579A3; TWI276886B; TW200305124A; EP1461800A1; WO2003060870A1; EP2270579B1; JP4299672B2; EP1461800B1; AU2002353143A1; KR20040083419A; JP2005515505A

Abstract

Various embodiments of a sub-pixel octal grouping are disclosed. The octal grouping may comprise three-color sub-pixels with one colored sub-pixel comprising twice the number of positions within the octal sub-pixel grouping as the other two colored sub-pixels. Various embodiments for performing sub-pixel rendering on the sub-pixel groupings are disclosed.

Description

The arrangement of subpixels of color flat panel display and sub-pixel rendering setting

Technical field

The application is relevant with the improvement of display design, particularly, arranges, shows that with colour element the improvement of used addressing method and video data format conversion method is relevant.

Background technology

Full color perception in the eyes is to be produced by the three class color sensitization neurocyte that are referred to as " cone ".This three classes photosensory cell is sensitive to the visible light of different wave length respectively: long, in and short (correspond respectively to " red ", " green " reaches " indigo plant ").The relative density of these three kinds of photosensory cells is obviously different each other.Red photosensory cell is more slightly than green receptor.Compare with red photosensory cell or green receptor, blue receptor is considerably less.

Summary of the invention

The sensory channel that the human visual system handles the detected information of eyes comprises: brightness, colourity and motion.Motion is important to the flicker threshold value only for the imaging system deviser.Therefore luminance channel is only accepted the input from redness and green receptor, is " colour blindness ".Luminance channel is with the such mode process information of the contrast that can strengthen the edge.Chrominance channel does not have the contrast on border humidification.Because luminance channel is used and has been strengthened each redness and green receptor, so the resolution of luminance channel is than the high several times of resolution of colourity passage.Blue receptor can be ignored to the contribution of brightness sensation.Therefore luminance channel is just as same spatial frequency signal bandpass filter.When peak response appears at 35 cycles/(cycle/0).It has limited the response when 0 cycles/and 50 cycles/on transverse axis and the Z-axis.This just means that this luminance channel only can differentiate two interregional relative brightnesses in the ken, and can't differentiate absolute brightness.In addition, if a certain details surpasses 50 cycles/, will mix.On a little higher than Z-axis of limit on the transverse axis.Limit on the inclined shaft is then lower.

Chrominance channel can be further divided into two subchannels, and Given this we just can see whole colors.These passages are different from luminance channel fully, and they are equivalent to two low pass filters.One of them can differentiate the color of object at any time, and no matter this object has much in our ken.Red/green colourity subchannel resolution limiting is to cross in 8 cycles, and yellow/chroma blue subchannel resolution then is cycles/of a specified duration.Therefore, for the spectators that great majority examine, red/green or yellow/error that blue resolution caused by low octave almost can't be noticed, just as not having fully, as Xerox and NASA, Ames Research Center experiment confirmed like that (referring to R.Martin, J.Glue, J.Madmer Detectability of Reduced Blue PixelCount in Projection Displays, SID Digest 1993).

Luminance channel is determined image detail by analysis space frequency Fourier transform component.By means of signal theory, any known signal can be represented as a series of various amplitudes and frequency sine wave and.From the arithmetic angle, this process that component sine waves of certain known signal are understood is called Fourier transform.The human visual system on the two dimensional image signal in response to these component sine waves.

Color perception is subjected to the influence of a kind of being referred to as " assimilation " effect or Von Bezold mixed color effect.The pixel (or sub-pixel or luminophor) why Here it is separates on the display can be felt as the reason of color mixture.Mixed color effect betides in a certain given angular distance scope in the visual field.Because blue receptor is rare relatively, therefore, for blue receptor, the angular distance that colour mixture occurs is bigger than red or green.This distance is about 0.25 ° to blue, and is about 0.12 ° for red or green.At 12 inches viewing distance place, 0.25 ° of 50mils (1,270 μ) that is equivalent on the display.Therefore, if blue pixel pitch is less than colour mixture spacing half (625 μ), just color can be mixed and can not be lost picture quality.This mixed effect is directly related with above-described colourity subchannel resolution limiting.Be lower than resolution limiting, just can see separate colors, be higher than resolution limiting, just can see color mixture.

The invention provides a kind of input three color pixel data with painted initial format and be transformed into method on the display panel, described display panel comprises a plurality of sub-pixel groups, and described sub-pixel group further comprises eight sub-pixels; Wherein each described sub-pixel is in first color sub-pixel, second color sub-pixel and the 3rd color sub-pixel one; Wherein said sub-pixel group further comprises four described first color sub-pixel, two described second color sub-pixel and two described the 3rd color sub-pixel; Two sub-pixels of wherein said second colour and two sub-pixels of described the 3rd colour constitute a checkerboard style substantially; Described method comprises:

Determine the sample region in secret of each data point of input three color pixel data;

Determine the resample area of each color sub-pixel on described display panel;

Draw one group of coefficient of each resample area, described coefficient is made of mark, and the denominator of mark is the function of resample area, and molecule is the function of the area of each sample region in secret, and sample region in secret may partially overlap with resample area;

Each introducing pixel data and multiplication that agrees sample region without prior consultation is amassed;

Each long-pending addition obtained the brightness value of the described color sub-pixel on described display panel represented by each resample area.

The present invention also provides a system, comprising:

A display panel, described display panel comprise a plurality of sub-pixel groups of expression output data form; Described sub-pixel group comprises that further four first color sub-pixel, two second color sub-pixel and two the 3rd colours are in pixel; Described second color sub-pixel and described the 3rd sub-pixel constitute a checkerboard style substantially;

Be received in the device of the input image data of representing in the input data layout that is different from described output data form; And

The sub-pixel rendering input image data is so that the described input image data in the conversion input data layout is the device of described output data form.

Description of drawings

The accompanying drawing that is combined in the instructions and constitutes the part of this instructions has been introduced various ways of realization and embodiment.

Figure 1A is depicted as on a kind of display device of the copied cells with 8 sub-pixels, a kind of aligning method of four colour primitive elements in a kind of array in plane.

Figure 1B be depicted as and have 8 sub-pixels (8 sub-pixels be by select and definite Figure 1A shown in 8 sub-pixels in the sub-pixel of four same colors of conduct obtain) a kind of display equipment of copied cells on, a kind of aligning method of three colour primitive elements in a kind of array in plane.

Fig. 1 C be depicted as and have 8 sub-pixels (8 sub-pixels be by select and definite Figure 1A shown in 8 sub-pixels in the sub-pixel of four same colors of conduct and the width that reduces them obtain) a kind of display equipment of copied cells on, a kind of aligning method of three colour primitive elements in a kind of array in plane.

Figure 2 shows that a kind of electronic driver aligning method graphic of the arrangement of subpixels mode shown in Figure 1A Figure 1B and Fig. 1 C.

Fig. 3 A, Fig. 3 B are depicted as the relative polarity at the active matrix point inversion driving method of a kind of LCD of the aligning method that adopts the color sub-pixel shown in Fig. 1 C and drive arrangement shown in Figure 2.

Fig. 4 A, Fig. 4 B, Fig. 4 C and Fig. 4 D are depicted as one group of independent and overlapping green, blueness and red resample area for the arrangement of subpixels shown in the figure IC.

Fig. 5 A, Fig. 5 B, Fig. 5 C and Fig. 5 D are depicted as green, blue and resample area redness of set of diagrams 4A Fig. 4 B, Fig. 4 C and Fig. 4 D, and the arrangement of subpixels shown in the overlay chart 1C covers to show their relative position.

Fig. 5 E is depicted as two logical pixel that show in the arrangement shown in Fig. 1 C, and these two pixels are to produce from the sub-pixel rendering operation of the resample area shown in Fig. 4 D.

Fig. 6 A is depicted as two logical pixel that show in the arrangement shown in the figure IC, and these two pixels are to produce from the sub-pixel rendering operation of the resample area shown in Fig. 6 D.

Fig. 6 B, Fig. 6 C and Fig. 6 D are depicted as the green resample area shown in Fig. 4 A that is respectively one group of blueness and the arrangement of subpixels shown in resample area redness and the overlay chart IC.

Fig. 7 A be depicted as Fig. 4 A Fig. 4 B and Fig. 4 C one group of green, blue and resample area redness of expression respectively, and overlapping to show their relative position.

Fig. 7 B is depicted as the arrangement of the resample area shown in Fig. 7 A, this arrangement by the arrangement of subpixels of figure shown in the IC overlapping to show their relative position.

Fig. 8 A and Fig. 8 B are depicted as other embodiment of 8 one group arrangement of subpixels with the various perpendicular displacements of sub-pixel.

Fig. 9 A and Fig. 9 B are depicted as other embodiment of 8 one group arrangement of subpixels of the various displacements of the main sub-pixel of division in the sub-pixel marshalling.

Figure 10 has described to comprise a system that is applicable to the sub-pixel rendering technology that drives the one flat plate that the illustrated embodiment that Clicks here makes.

Figure 11 A and Figure 11 B have described two certain embodiments of the flow diagram of operation software and hardware sub-pixel rendering on suitable display.

Figure 12 is a kind of specific embodiment of realizing the demonstration of making according to several embodiment disclosed herein.

Embodiment

This part is described various implementations and embodiment in detail, has mentioned the part example in the description of drawings.To adopt same reference number to refer to same parts or similar parts in the whole instructions as far as possible.

Arrangement of subpixels

Figure 1 shows that to have a kind of arrangement mode that is organized as 110 the sub-pixel emitters that four look luminophors are arranged 100, each row group moves down a sub-pixel.Thereby the unit group 120 of having duplicated with having formed a bigger rectilinearity that constitutes by 8 sub-pixels.Introduced this an array in ' 094 application, ' 094 application simultaneously also discloses the way of numerous sub-pixels being arranged to same color dot in copied cells, figure is a such example shown in the IB, and wherein four luminophors 106 in 8 luminophor repeat cell groups 120 have been set as same color.For example, these four luminophors 106 can be set as brightness adjustment (that is balance) green.For example, other sub-pixel emitters can be set as red 104 and blue 102.The zone of 106 green sub-pixels is adjusted in brightness, and promptly real estate is equivalent to the twice of redness 104 and blue 102 subpixel area, but is had same brightness by humorous being adjusted to red 104 sub-pixels.Whole green energy can be generated a gratifying white point by humorous being adjusted to when all sub-pixels are fully illuminated.In ' 094 application, disclosed before the method for this harmony green sub-pixels brightness.

Among Fig. 1 C, compare with 102 in pixel emitters 104 with other two, the size and the aspect ratio of four sub-pixel emitters 106 all are reduced.

Minority sub-pixels

104 and 102 aspect ratio can be adjusted equally.In this example, the relative size of sub-pixel 106 is adjusted to half of

sub-pixel

104 or 102 sizes.As previously mentioned, color can be selected on demand.Most color sub-pixel occupy the second and the 4th row although it is pointed out that simultaneously that 8 one group the marshalling of duplicating is shown, also can satisfy most sub-pixels and occupy first and tertial requirement.

Among another embodiment, color is configured to redness 104, blueness 102 and does not have the green 106 of luminance balance.Because green 106 quantity is the twice of redness 104 and blue 102 quantity, when the result is fully illuminated when all sub-pixels, just can see a gratifying white point.

In these two embodiment,, can adjust the sub-pixel aspect ratio for just array of display 100 comprises foursquare repeat cell groups 120.This need be placed on most colours on the square lattice in pixel emitters 106, and minority

color sub-pixel luminophor

102 and 104 is placed on or almost is placed on one Utopian " checkerboard ".For another kind of color the example of embodiment is set, sub-pixel 106 can be configured to redness, and sub-pixel 104 can be configured to green, shown in figure IB and figure IC.Under this color assignment, the sub-pixel rendering algorithm that is about to below discuss will be worked similarly.

Not only green or red sub-pixel can be served as the plurality of colored sub-pixel of 8 one group marshalling 120; Blue subpixels also can be served as most sub-pixels.This type of aligning method was once disclosed in ' 738 provisional application.Therefore, all three kinds of color one redness, green and blue can take most sub-pixel position of marshalling.In addition, what deserves to be mentioned is that when these color one redness, when green and blue is used to present embodiment is described, on behalf of the suitable Color Range one of a demonstration, other suitable selections one of three kinds of colors can realize purpose of the present invention equally.

Shown in Figure 1A, Figure 1B and Fig. 1 C, sub-pixel is rectangular shaped substantially.Other shape of what deserves to be mentioned is sub-pixel also is possible, expects within the scope of the present invention.For example, if can produce, the shape of other numerous regular and irregulars of sub-pixel also is possible.Mode described herein can be used for marking sub-pixel rendering (SPR), but has only when the combination of 8 color sub-pixel is arranged in this mode.

Because the shape of sub-pixel can be various in the scope of the invention, the accurate position of sub-pixel also can be varied in the scope of the invention.For example, Fig. 8 A and 8B have described the marshalling that similar 8 sub-pixels constitute, and one of them or two most bars 106 have displacement (relatively or in other mode) for sub-pixel 102 and 104.Other perpendicular displacement is also possible.

Other embodiment of 8 one group marshalling is possible equally.Fig. 9 A and 9B have described a kind of 8 one group marshalling, and wherein most sub-pixels 106 are dispersed in the checkerboard that is made of sub-pixel 102 and 104.Most sub-pixel position also have other arrangement mode in this type of checkerboard, and within the scope of the present invention.

Fig. 9 A and 9B can have cylindrical electrode to be zigzag to pass this display.Compare with the RGB stripe system that equal resolution is arranged, the cylindricality driver is saved and be should be 1/3, the quantity of sub-pixel be approximately the RGB stripe system sub-pixel quantity 2/3.

Other embodiments of the invention also are possible.For example, whole 8 one group sub-pixel is organized into groups the effect of the row and column driver that can be rotated by 90 degrees reverses is connected to this group.The copending application of " color monitor with horizontal arrangement of subpixels and design " by name discloses this type of sub-pixel level aligning method, and is incorporated herein by reference.

Another kind of luminophor " checkerboard " when being numbered 09/916,232 (' 232 application) in pending trial and the common transfer U.S. Patent application disclosed redness and green " checkerboard " similar.This patented claim by name " being used to have the arrangement of colour element of the full color imaging device of simplified addressing ", file July 25 calendar year 2001, employing is numbered 10/150, the sub-pixel rendering technology of 355 U.S. Patent Application Publication, this patented claim " the sub-pixel rendering method and system that adopts gal to adjust " by name, on May 17th, 2002 filed.These copending applications are drawn herein does reference.The disclosed method of above-mentioned copending application can be made amendment and is used for embodiment disclosed herein.

Figure 2 shows that drive arrangement 200 a kind of graphic of the colorful light-emitting body arrangement of subpixels shown in Figure 1A, Figure 1B and Fig. 1 C.For simplicity, the sub-pixel in the given example is identical with the quantity of the sub-pixel shown in the figure IC.Because parts 210 can be represented one or several electronic component (diagram does not show this point in order to avoid masking device), these drive arrangement can be used in a large amount of display techniques.Particularly they can represent the capacitive display element that is used for passive addressing liquid crystal display (LCD) or electroluminescence demonstration (EL).Can also represent the gaseous state arresting element in the plasma display panel (PDP), the semiconductor diode element of passive addressed inorganic light-emitting diode or organic light emitting diode display, transistor, electric storage means and the capacity cell of active matrix liquid crystal display (AMLCD) also can be represented multiple transistor, electric storage means and the light-emitting component of active matrix organic light-emitting H utmost point tube display (AMOLED).Generally speaking, can represent color sub-pixel in other known or display technology of remaining to be invented and relevant electronic component thereof.

Known in the industry driving timing and method can be used for above-mentioned NXM and drive matrix.But need be selected according to concrete color, particularly to adjust according to the color change of passing in dull and stereotyped checkerboard or the independent row.For example, can improve known in the industry technology be in the passive liquid crystal display " multi-line addressing " or " multi-line addressing " so that the marshalling of row be limited in the row combination of odd and even number.This will reduce potential color colour contamination and disturb, because in the row that two interactive color sub-pixels are arranged, have only a kind of color to be marked at every turn.

Inversion schemes is applicable among the embodiment disclosed herein, is pure zero and gas current thereby the electric polarity at these two ends, graphic crossover display terminal unit provides a time average at two ends, unit.Be two kinds " points be inverted "

graphic

300 and 310 shown in Fig. 3 A and Fig. 3 B, refer to respectively " 1 * 1 " and " 2 * 1 " on the active matrix liquid crystal display that these two kinds graphic all can obtain good effect.Photoemissive when unbalance when taking place between the both positive and negative polarity, especially when the motion of the picture that shows on the eyes tracking screen, the graphic better effects if shown in Fig. 3 B.Every width of cloth chart has all shown the polarity of half display mark field, and the polarity of another half-court is opposite, and these alternately occur, and will draw pure zero current (zero Dc bias), and the insider knows this point.

Data Format Transform

At an embodiment of the Data Format Transform that adopts district's resampling technology, Fig. 4 A, Fig. 4 B and Fig. 4 C are depicted as respectively green 406 for green, blue and red plane, blue 402 and red 404 resample area array.Notice that each color resample area array 406,402 and 404 is made of resample area 426,422 and 424, and each resample area all there is the resample points that is associated with it 416,412 and 414 separately.In each color plane, resample points 416,412 and 414 respectively with green 106, blue 102 and the relevant position of red 104 subpixel area be complementary; But inter-color-plane-phase relationship is then dispensable accurately for it.Number that what deserves to be mentioned is phase relation is can be arbitrarily.

Fig. 4 D is depicted as a kind of specific inter-color-plane-phase relationship 400.This relation can be used to change traditional square lattice red, green, blue look rgb format that is converged fully, and this form will show one to one with the square green 106 sub-pixel grid shown in the figure IC.In this inter-color-plane-phase relationship 400, green 406, blueness 402 and red 404 resample area array are confirmed as making redness 414 and blue 412 resample points to overlap with green 416 sampled points substantially.This just makes green sub-pixels 106 as is located on red 104 and the top of blue 102 sub-pixel checkerboards or closely related with it.

Be respectively the green 406 shown in Fig. 4 A Fig. 4 B and Fig. 4 C, blueness 402 and red 4D4 resample area array shown in Fig. 5 A, Fig. 5 B and Fig. 5 C, it is overlapping that these arrays are schemed 100 of the arrangement of subpixels shown in the IC, has the inter-color-plane-phase relationship 400 shown in Fig. 4 D.Fig. 5 D is depicted as the inter-color-plane-phase relationship 400 of Fig. 4 D, and it is overlapping by 100 of the arrangement of subpixels modes shown in Fig. 1 C.These charts only are indicative, just assist to understand resample points among this embodiment, reconstruction point, resample area with the relation between the sub-pixel position.

Having described in ' 355 patented claims of above institute reference and will having introduced the data format conversion is the method that is suitable for this display.Method is as follows: (1) determines the sample region in secret of each data point of introducing three color pixel data; (2) determine the resample area of each color sub-pixel in the display; (3) draw the coefficient of each resample area, this coefficient is made of mark, and the denominator of mark is the function of resample area, and molecule is the function of the area of above-mentioned each sample region in secret, and sample region in secret may partially overlap with resample area; (4) the introducing pixel data and the multiplication of each sample region in secret are amassed; (5) each addition is obtained the brightness value of each resample area.

Investigate re-sampling operations " one to one " the format conversion situation shown in Fig. 4 D and the figure SD, green plane conversion is a single optical filter.Red and blue color planes adopts and goes through a 3X3 filter factor matrix that draws in ' 355 applications:

0	0.125	0
0	0.125	0	0.125	0.5	0.125

0

0.125

0

Fig. 5 E is depicted as the result who inserts two panchromatic input data pixels.These two pixels are converted into two groups of sub-pixels that insert with different amplitudes, are called " logical pixel " 500.One of them logical pixel be positioned at red sub-pixel 104 the center or near it.Green sub-pixels 106 is configured to 100% illumination.Red sub-pixel 104 is configured to 50% illumination, and four blue subpixels 102 on every side are configured to each illumination of 12.5%.The result is in the central authorities of redness 104 and green 106 sub-pixels, and human eye can be seen a white point.Another logical pixel 500 is arranged to 100% illumination with green sub-pixels 106 equally, and the blueness on next door is arranged to 50% illumination in pixel 102, and four red sub-pixel 104 on every side are arranged to each illumination of 12.5%.

Fig. 6 B and 6C are depicted as one selectable blue 602 and red 604 color plane resample area array one are expressed as square (60X) optical filter ([0.5 0.5]) herein---replace blueness 402 shown in Fig. 4 B and Fig. 4 C and red 404 resample area array respectively.Fig. 6 D has illustrated a kind of inter-color-plane-phase relationship 610 that adopts green 406, blueness 602 and red 604 resample area array.Fig. 6 A is depicted as the re-sampling operations that adopts inter-color-plane-phase relationship 610 and inserts the logical pixel 600 that two input data format pixels produce, and inter-color-plane-phase relationship 610 is to get the input data of pixel one to one from having with green sub-pixels 106.These logical pixel 600 can have same relative position with two logical pixel 500 shown in the figure SE.Simultaneously, its central authorities that also may be positioned at green box filter is complementary with an input pixel substantially by regulating grid a little.

The adaptivity filtering technique also can be embodied in the disclosed herein pixel arrangement mode, will further specify this point below.

Say once again, the green resampling used a single optical filter.Red and blue color planes adopts very simple 1 * 2 a coefficient optical filter: [0.5 0.5].

Adopt a block adaptive optical filter to reach 3 * 3, use the minimum value of two row memories with regard to the sampling that does not require the input data.This adaptivity optical filter, with be numbered 10/215, disclosed similar in the U.S. Patent application of pending trial and common transfer in the time of 843 (' 843 application), this patented claim is called " method and system with sub-pixel rendering of auto adapted filtering ", on August 8th, 2002 filed, herein by incorporated by reference.This test can be used the less sampling of input data, as the matrix of IX3 or IX2.Green data is sampled so that perpendicular line or oblique line are detected, and subsequently, the redness and the blue data of contiguous green test point may be changed.

Therefore, whether an adaptivity filtering detects and can be undertaken being detected to detect the high-contrast limit by following step: green data (G) and a minimum value and a maximal value are made comparisons, if G＜minimum value or G＞maximal value, a record value is set to 1 so, otherwise record value is set to 0; Relatively three continuous green data point record values judge to detect template (mask) whether the edge is detected; If detect, that just to redness and/or blue data take appropriate measures just like, use gal or a kind of new value or different filter factors.

Following table has been explained this detection method:

Data (at three continuous points)	0.98	0.05	0.0
Data (at three continuous points)	0.98	0.05	0.0	Low detect (G, 0.1)	0	1	1
High detection (G＞0.9)	1	0	0	Low detect (G, 0.1)	0	1	1
High detection (G＞0.9)	1	0	0	Lower and not high	Correctly	Correctly	Correctly

For above-mentioned example, a limit is detected, and a large amount of selections can be arranged and/or take a large amount of measures in this point.For example, gal correction can be applicable to the output to red and/or blue box filter; Perhaps adopt representative to require a new fixed value of the output of balance color; Or be used in pixel painted (SPR) filtering.

In this case, similar to the detection method of black line, stain, black border and black oblique line, because have only three values detected:

In the last table, one side first row can be represented any black pixel that white pixel is arranged.Second row is represented a limit of a black line or stain.The third line is represented a limit of a black line of another position.Binary numeral is used as a coding of detection.

Detection method to white straight line, white point, white edge and white oblique line is as shown below:

If it is correct detecting, for example, high detection and low the detection were respectively for 240 and 16 (exceeding 255), and the output valve of using these limits of box filter (box filter) so may be 128+/-4 or other suitable values.Pattern match (pattern matching) is near the binary numeral of record value.128 one that is enhanced a suitable gal power simply resets and can be output in the display.For example, for gal-2.2, output valve is near 186.Even input has variation, this is an edge modifications item, therefore can use a fixed value and can not violate manifest error.Certainly, for more accurate, can use a gal look-up table equally.What deserves to be mentioned is difference but may similar modified value can be used for white edge and black border.What deserves to be mentioned is equally as the result who detects the edge, redness and/or blue data all can by a different set of filter factor handle just like, use (10) filtering (being single filtering), it can effectively close the sub-pixel rendering at that pixel value.

Above-mentioned detection was mainly at green test, with aftertreatment redness and blue in the past.As selection, red and blueness can be detected respectively, and skill need be taken measures.If only need correction technique is used in black border and white edge, all three look data sets all can be detected so, and carry out logical operation (and the result ANDed together) together.

Further simplification can be carried out as follows.If delegation has only two pixels to accept rim detection, so above-mentioned detection can further be simplified, and still can reach high threshold and low threshold value.If (01) or (10) be detected, just can use a new value once otherwise use original value.

Also have another kind of short-cut method can use (being example with the redness): from being right after the red value value R on the left side _N-1If in deduct red data value Rn Δ greater than a predetermined number---for example 240 1 the edge is detected so.If a limit is detected, just can change a new value, or use gal, will be worth Rn and output to display, or use new spr filter coefficients; Otherwise if there is not the limit detected, the result of box filter outputs on the display.Because Rn or R _N-1One of them is big slightly, and the absolute value of Δ can be detected.Same simplification can be applied on the blueness; As fruit green is the division pixel in marshalling, and that does not just need to detect or adjust.As selection, can (be Rn-R to falling the limit _N-1＜0) and to rise the limit (be Rn-R _N-1＞0) adopts diverse ways.

The result obtains each logical pixel of having only H sub-pixel 600.For obtaining a white point, red and blue data are adopted box filter, the illumination of green sub-pixels 106 is set to 100% as previously mentioned.The redness 104 on next door and blue 102 illumination all are set to 50%.The re-sampling operations of the inter-color-plane-phase relationship 610 shown in Fig. 6 D is very simple, with low cost, but its picture quality well.

Above-mentioned two data format conversion methods are placed on a fairly large number of green sub-pixels by the center with logical pixel and are complementary with human eye.The width of green sub-pixels has only half of red sub-pixel, and its brightness is but identical with the brightness of red sub-pixel.In fact, the good brightness of each green sub-pixels 106 looks like to have only half of relevant logical pixel in each zone, remaining brightness with near the red sub-pixel that is illuminated relevant.Therefore, green sub-pixels provides most high resolving power intensification modulation, and redness and blueness provide lower resolution color modulation, are complementary with human eye.

Fig. 7 A is depicted as an alternative inter-color-plane-phase relationship 700 using the green 406 shown in Fig. 4 A, 4B and the 4C, blueness 402 and red 404 resample area array.Notice that the relative phase in this inter-color-plane-phase relationship 700 is identical with the relative phase of the color sub-pixel arrangement 100 shown in Fig. 7 B, the relative phase of the resample points of this inter-color-plane-phase relationship 700 is identical with the relative phase of inter-color-plane-phase relationship 610.If this inter-color-plane-phase relationship 700 is used as the Data Format Transform of " one to one ", green will be a single filtering again, and redness and blueness will adopt 3X2 coefficient filtering core:

0.0625	0.0625
0.0625	0.0625	0.375	0.375
0.0625	0.0625	0.375	0.375

Notice that each total of this two hurdle all is 0.5, similar to the redness of inter-color-plane-phase relationship 610 with the coefficient of blue resampling filtering operation.

This inter-color-plane-phase relationship 700 shown in Fig. 7 A can be used for the scaling up and down of traditional formatted data group.The area resample method of calculating filter coefficient and the method for tracking input and output data buffer are disclosed in ' 355 applications of institute's reference.But, according to another embodiment, as long as red and blue color plane can area resample, in the time of on transforming data set with the arrangement mode that is presented at the color sub-pixel 100 shown in the figure IC, the way of realization of a kind of novelty of a Bicubic interpolation arithmetic rule (bi-cubic interpolation algorithm) of these data sets of employing amplification is come the square lattice calculating filter coefficient item for green sub-pixels 106, and this method is more convenient.

Figure 10 has described a system 1000, and in this system, the display of making according to disclosed various embodiment in this explanation is driven by a kind of sub-pixel rendering technology 1004, and this technology can be kept on the physical unit 1002.One input image data stream 1008 can be input to sub-pixel rendering technology 1004 and transform in mode disclosed herein.One output image data stream 1010 is sent to display equipment 1006 to drive each sub pixel and then to form image.Several places of drawing as this place with reference in point out that sub-pixel rendering (SPR) technology 1004 can be by hardware and/or software, or the combination of the two is realized.For example, sub-pixel rendering technology 1004 can be used as logic (hardware or software) and is kept on the display, or is kept on chart control chip or the plug-in card.

Figure 11 A and Figure 11 B have described two of sub-pixel rendering kinds of specific flow diagrams in software and hardware respectively.Among Figure 11 A, sub-pixel rendering can be realized on people's computer one by one or on other disposal systems and/or the method in advance.In this case, the image of precolor can be downloaded on controller or the interface, and is sent on the driver of this display of operation.Among Figure 11 B, pictorial data can from numerous different sources input one for example have the notebook computer of digital video interface output or the computed table that has the digital video interface to export---be input to a hardware module of carrying out sub-pixel rendering.There, sub-pixel rendered data finally can send on this display by a controller or interface and a driver.Certainly, other hardware and software implementations also are possible, and Figure 11 A and Figure 11 B have only described two kinds in the possible implementation.

Figure 12 shows that a specific display implementation of a 320X320STN display of employing sub-pixel copied cells disclosed herein.Although Figure 12 also discloses the size of each sub pixel, what deserves to be mentioned is that other sizes can meet the demands too, Figure 12 has only provided a kind of explaination of implementation.

Because of elaboration of the present invention with reference to exemplary embodiment, skilled insider is understood that and can does various variations within the scope of the present invention to this, available congener replaces element wherein.In addition, also can not depart from the scope of the invention, do a large amount of adjustment so that a certain particular case or material adapt to purport.For example, some above-mentioned embodiment can be implemented on other display technologies, as Organic Light Emitting Diode (OLED), electroluminescent display (EL), electrophoretic display device (EPD), active matrix liquid crystal display (AMLCD), passive matrix liquid crystal display (PMLCD), incandescent display, solid luminescent diode (LED), plasma panel display (PDP) and flash of light display.Therefore, the conduct that the present invention should not be limited to be disclosed is at a certain specific embodiment of optimal mode of the present invention, and comprises all embodiment in the accessory claim book scope.

Claims

1. input three color pixel data with painted initial format are transformed into the method on the display panel, and described display panel comprises a plurality of sub-pixel groups, and described sub-pixel group further comprises eight sub-pixels; Wherein each described sub-pixel is in first color sub-pixel, second color sub-pixel and the 3rd color sub-pixel one; Wherein said sub-pixel group further comprises four described first color sub-pixel, two described second color sub-pixel and two described the 3rd color sub-pixel; Two sub-pixels of wherein said second colour and two sub-pixels of described the 3rd colour constitute a checkerboard style substantially; Described method comprises:

Determine the resample area of each color sub-pixel on described display panel;

Draw one group of coefficient of each resample area, described coefficient is made of mark, and the denominator of mark is the function of resample area, and molecule is the function of the area of each sample region in secret, implies sample region and resample area and partially overlaps;

2. the method for claim 1, wherein a plurality of resample area of the color sub-pixel of each in display form a resample area array, and described method further comprises:

Determine the phase relation between the resample area of each color sub-pixel.

3. method as claimed in claim 2, determine that wherein phase relation further comprises:

Determine the position of resample points of the resample area of each described color sub-pixel, so that described second colored and described the 3rd color resample point can cover the resample points of described first colour substantially.

4. the method for claim 1, wherein said first colour are green, and second colour be redness, and the 3rd colour is a blueness;

Wherein said green plane conversion comprises a single optical filter, and red and blue color planes adopts 3 * 3 filter factor matrixes.

5. method as claimed in claim 4, wherein said green color plane comprise a single optical filter that is positioned at the center, adjust this optical filter to be complementary substantially with the input pixel according to the sub-pixel grid.

6. the method for claim 1, described eight sub-pixels of wherein said sub-pixel group are placed in four sub-pixels of two row, and two sub-pixels of described first colour, a sub-pixel of described second colour and a sub-pixel of described the 3rd colour are placed in every row of described two row.

7. the method for claim 1, described eight sub-pixels of wherein said sub-pixel group are placed in four sub-pixels of two row, and

Wherein said checkerboard style is to be followed described sub-pixel of described the 3rd colour and formed at the described sub-pixel that a described sub-pixel of described the 3rd colour of second row is followed described second colour by the described sub-pixel of described second colour of first row.

8. the method for claim 1, the area of the combination zone of two sub-pixels of wherein said first colour equal the region area of any one sub-pixel in the described sub-pixel of described sub-pixel of described second colour and described the 3rd colour.

9. the method for claim 1, described eight sub-pixels of wherein said sub-pixel group are placed in four sub-pixels of two row and the described sub-pixel of described first colour is placed in the row of described sub-pixel group.

10. method as claimed in claim 9, second of the described row of first row of the described row of the described sub-pixel of wherein said first colour and the described sub-pixel of described first colour in the described sub-pixel group are shown displacement.

11. the method for claim 1, wherein said display panel is the unit that utilizes the display system of one of one group of display technique, described group technology comprises the LCD of passive addressing, electroluminescent display, plasma display, passive addressed inorganic light-emitting diode, organic light emitting diode display, active matrix liquid crystal display and active matrix organic light emitting diode display.